Well that is stupid. College is supposed to be a 4 year endeavor but many take 5 years to graduate.
Many athletes in major sports redshirt one year as we all know so they already have a Five years to play Four years rule.
Four years is enough, and all this would do is add a class year like GR for graduate or SR2 for second senior year so there would be more players getting paid more adding a lot more expense. Football teams that want to stay around 85 schollies will end up having 105 with this extra year.